mcneven



r(Model.) 2 Sheets-Sheet 2.

' J. MclI-E-VElI.v

INDICATOR LGK.

No'. 252,120. Patented Jan. 10,1882.

WITNESSES: INVBNTOR UNETE JOHN MUNEVEN, OF NEW YORK, N. Y.

INDICATOR-LOCK.

SPECIFICATION forming part of Letters Patent No. 252,120, dated January 10, 1852.v l l Application filed May 20, 1881. (Model.) I

To ult whom it may concern Be it known that l, JOHN MCNEVEN, of the city, count and State of ANew York, have invented certain new and useful Improvements in Padlocks and in Keys for Same; and I do hereby declare the following to be a full, clear, and exact description of thel same, reference being had to the accompanyingdrawings, forming part of this specification. n

llze objectof these improvements is to produce a lock that is not liable to be picked or have the indicating mechanism tampered with or to get out of order with fair wear and tear. This padlock `is 'virtually a double lock, having two bolts and two key-holes. The lock is divided into three compartments, the lower compartmentcontainin gratchets and check-springs that control the key-pins, as seen in Figures 7 and 9. The second compartment contains the lower or principal locking-holt and check springs, as seen in Figs. 5, `tu', and 9. The first orupper compartmentcontains the registering and locking bolt, as seen in Figs. 4 and 9.

In the drawings, which illustrate apadlock containing my improvements, Fig. 1 is an exterior' front view of the padlock. Fig. 2 is a rear view of the front plate thereof', showing the rear surfaces of the registering-wheels. Fig. 3 shows the front surfaces of such registering-wheels. Fig. 4 is a view of the upper side of the first interior plate, on which is contained the registering-bolt,7 so called. Fig is a view4 of the upper side of thc second interior plate, on which is contained the principal lockin, r-bolt,7 so called. Fig. 6 is a view of the lower side or surface of this second interior plate. Fig. 7 is a view of the inner surface of the' rear plate ot' thepadlock. Fig.8 is across vertical section taken through the line :c x of Figs. 2, at, and 5. Fig. 9 is across vertical section taken through the line y y of Figs. 2, 4, and 5. Fig. l() is a longitudinal vertical section of the key. Figs. 11 and l2 are cross vertical sections of such key, taken through the lines z z and z z of Fig. l

a is the front plate of the lock. bis the rear plate. c is the front middle plate, between which and the front plate,

a., is the registering and locking bolt d.

e is the rear middle plate,

between which and the rear plate is the princig g, &c., are four posts, re-

pal lockingbolt f.

taining together the said plates. The bolt d is secured between guides or ways h h, so as to have a slide motion therein according to the locking or unlocking operation. The boltfis secured and moves in a similar manner between ways jj are keyholes. 7c c'are registeriiig-wheels, geared to eachother and having numbers and letters thereon, so that each time the wheels are moved in manner as hereinafter more fully explained they will present at the openings in the front plate, a. a different combination.

. l l are two arms attached to the bolt d, pass` ing down through slots in plate c to the rear ofthe principal locking-bolt f, so that as the locking operation is performed, the rear portion of the bolt d being acted upon by the key through the keyholej', both bolts will be shot forward.

m m are check-springs to the locking-boltf, secured to the underneath side o f the rear plate, e, and which can be depressed from the upper rear surface ofthe plate c by the wedge-shaped `sleeve n, moving in a slot in plate e, the projecting pin n being the part against n hich the key will impinge to push the wedge forward in order to depress such check-springs.

o o are two key-pins, heilig square the distance of the first compartment only, and round the rest of the distance, so that the square o-1 ofthe pipe of the key may operate to turn the click-wheel while the key is in the first'comparttnent and to escape the square head alter the key-pipe has passed into the second conipartment, the pipeot' the key beingcor-rvspondingly formed tothe key-pin-narnely, the lower part ofthe interior of the pipe square and remainder round in cross-section. (See Figs. 10, l1, and 12.)

p is a lever, which is operated by the checkwheel q', connected to the key-pin o', so as to free itsprojection p from contact with the projection p on the sleeve n just prior to the pas sage of the key to the lower compartment for operation on such wed ge to depress the springs m and m.

r is a spring, which comes into contact with the pins r on the rear surface of the registering-Wheel 7c as the bolt d is moved backward,- and thus moves the wheel a short distance. The click-spring s comes into contactwith an IOO other of said pins i", and thus prevents the revolution of the wheel k in the reverse direction.

t t are dogs and retaining-springs to the click-wheels q q.

u is a spindle, having a cap, u', at its lower end and a spiral spring, u, around its body, all placed within the key, so as to enable the key with a slight pressure to adapt itself conveniently to the upper compartment ofthe lock, and with some additional pressure to pass down below the square head of the key-.pin and into the lower compartment of the lock.

n e are check-springs to the upper bol t, d, which, after such bolt has been shot back and the register changed, as shown in Fig. 9, prevents the-bolt d being worked back and forth and working the register without lirst going through the whole process of unlocking. These check-springs c o are depressed and thrown down out ofthe way of the springs m mof the bolt d by the passage over them ot' the boltf in the unlocking operation of such latter bolt.

On the locking operation the boltf passes from off these springs 2J e, and they are again active to catch and retain the springs m in of the bolt d on the unlocking operation of such bolt, and consequent change-of the combination of letters and figures shown by the indicating mechanism.

The operation of the lock is as follows: To lock, both bolts being in the position shown by the registering and locking bolt d, the key is inserted in the key-hole j to the depth of the first compartment and turned in the direction ofthe arrow on Fig.4. This carries both' bolts forward into a locked position. In unlocking each bolt is separately operated. The key is first placed in the key-hole j', depressed to the second compartment, moved to the left a quarter of'a circle, when the key will come up through the slot it, Fig. 4. Theil, continuing thev key around another quarter of a circle, the square head of the key will cause the click to operate and throw o' the guard-leverp from the sleeve n. Then the key is depressed back to the second compartment and turned in the direction of the arrowon Fig.5, which will pushforward the sleeve a and depress out of the way of the bolt f the check-springs m m. The key is then placed in the key-hole j, depressed to the depth of one compartment, and turned therein in the direction of the double arrow on Fig. 4, which forces back the bolt d to the position shown in Figs. 4 and 9, in doing which the spring i' operates on one of the pins Y of wheel k, (one of the geared together indicating wheels,) and thereby changing the combination of figures and letters thereon, and also by means of the arms t Z, passing to the rear of the checksprings` e n, prevents the bolt d being moved forward and backward until the whole unlocking and locking operation is gone through with again. The keyis continued around to the extent of a semicircle, when it will pass down into the next compartment, and then by a movement in the reverse direction, as shown by the double arrow on Fig. 5, the principal lockingboltfis shot back, and this carries out ofthe way of the arms 'Z l the springs o e, in manner as hereinbetore explained, so that both bolts will coincide and be free for forward movement together in the locking operation. The bolt j' iu the locking operation permits the check-springs m m at its rear to rise, as in unlocking the boltfhas pushed back thewedge n from out of such contact with suoli springs and from holding them in a depressed position, which position they were placed in by the first operation iu unl'ocking ot' moving forward the wedge n, and thus depressing the springs m m by entering in between their base-plate m and the plate e, to which such base-plateis riveted.

I claim- 1. In an indicator-lock, the combination of a locking-bolt, d, a second principal locking-bolt, f, check-springs for each of said bolts, and the wedge-shaped sleeve n., to depress the checksprings in in, substantially as described.

2. In an indicator-lock, the combination of the locking and unlocking wedge n with the check-springs m m and the lever 1J, substantially as described.

3. In an indicator-lock, the combination of the registering-wheels k 7c', the bolt d, and the principal locking-bolt j', substantially as described.

4. In an indicator-lock, the combination of the registering-wheels lo k', the bolt d, the principal locking-bolt f, and the respective check-springs to said bolts, substantially as described.

JOHN MCNEVEN.

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